Anyone used the EIG c02 batteries?

Please refer to the following link:
https://youtu.be/z86Mt6t6Cn8

Has anyone used these in a build ?
I would like to use then in my current build for a 72V 50ah battery.

Qs205 motor

Thoughts ?

Datasheet:
https://www.google.com/url?sa=t&source=web&rct=j&url=http://www.ebaracus.com/sites/default/files/2012/12/EIG-ePLB-C020-Datasheet.pdf&ved=2ahUKEwi4gqzK4qvsAhXISH0KHd-GDXkQFjAAegQIEBAC&usg=AOvVaw02wA2_vGWR9NDO-bjx6v3n

Good cell where you going to get them from ? New used ? Amber wolf has been using those for a while and he loves them.